下面各题怎样简便就怎样算.5÷(7÷11)÷(11÷16)÷(16÷35)28.67×67+315×286.7+573.4×12010×(425+212)-1÷12.5% 1991+19911991+199119911991+…2002+20022002+200220022002+….
7 |
11 |
11 |
16 |
16 |
35 |
11 |
7 |
16 |
11 |
35 |
16 |
1 |
5 |
1 |
20 |
2 |
5 |
1 |
2 |
1 |
8 |
1 |
8 |
1991+19911991+199119911991+… |
2002+20022002+200220022002+… |
1991×(1+10001+100010001+…) |
2002×(1+10001+100010001+…) |
1991 |
2002 |